You may remember that on a previous card of Ruben Sierra the player pictured was not Sierra at all. Pretty embarrassing for ProCards even if Ruben was still in the minors.
That mistake happened in 1986. In 1988 it happened again, this time on Sierra's Starting Lineup card. At the height of Ruben's popularity Kenner issued this card with his Starting Lineup figure. On the card we see Curtis Wilkerson starting out of the batter's box. I have no idea how the company managed to confuse the slugging young outfielder with the rather light-hitting middle infielder. It would be interesting to know exactly what happened.
As far as I can tell, this card is an uncorrected error.